BI616959
Bucyrus International, Inc. 59HR ELECTRIC BLAST HOLE DRILL
ANGLE DRILLING All tool handling procedures are carried out the same way either in angle drilling or in standard vertical drilling. The only addition to the procedures is the use of the pipe positioner to hold the drill pipe to be threaded together in position and a mast A-frame with adjustable front legs. It also includes an adjustable pipe seal which can be moved to align with the drill pipe. During angle drilling the deck remains horizontal providing a horizontal surface to work from. The drill pipe, however, is laying at the angle of the mast. In order to make a joint at the drilling deck, such as when adding the stabilizer, bit or drill pipe or when removing these components, it is necessary to hold the drill pipe in position so as to line up with the drill pipe or component being held on the drill deck. This is the function of the pipe positioner. The pipe positioner is moved into position by hydraulic cylinders. The pipe positioner jaws are opened by a single hydraulic cylinder. NOTE:
Do not operate the rotary machinery except at low speeds to make and break joints while the jaws are closed around the pipe. Operating the rotary machinery at high speeds or drilling while the pipe positioner jaws are closed around the pipe will damage the jaws and positioner structures.
To make a joint with the pipe positioner, proceed as with normal joint assembly. When the pipe rack has been moved into position, retract the positioner into place and lock the jaws around the pipe. Proceed as normal to make the joint. Once the joint is made, open the positioner jaws and extend the positioner to the stored position. To break a joint both the pipe positioner and the breakout wrench are utilized. The pipe positioner is used to hold the pipe in position to be loaded into the pipe rack. The breakout wrench is used to break the joint. To break a joint, proceed as normal with joint disassembly. Proceed as normal with joint disassembly. Before breaking the joint completely, clamp the pipe with the pipe positioner. After breaking the joint, hoist the drill pipe and lower the pipe rack, release the jaws and extend the positioner. Proceed as normal with the pipe joint disassembly procedure.
Manual No. 10425
84
August 2006
